Stop-motion device for doubling and twisting machines.



F. W. ROCHELLE. STOP MOTION DEVIGE FOR DOUBLING AND TWISTING MACHINES.

APPLIOATIOF FILED AUG. 5, 1907.

Patented July 6,1909.

2 SHEETS-SHEET 1.

F. w. ROGHELLBQ STOP MOTION DEVICE FOR DOUBLING AND TWISTING MACHINES. AIPLIOLTION FILED AUG. 5, 1907.

927,285. Patented July 6,1909.

2 SHEETS-BEBE! 2.

UNITED sTAqlljnlbl PATENT OFFICE.

FREDRICK WILLIAM ROCHELLE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO IVINS,

DIETZ & METZGER COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

STOP-MOTION DEVICE FOR DOUBLING AND TWISTING MACHINES.

To all whom it may concern:

Be it known that I, FnnnnIoK WILLIAM ROCHELLE, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Stop-Motion Devices for Doubling and Twisting Machines, of which the following is specification.

My invention relates to that class of douhling or twisting machines in which the operation of the doubling or twisting mechanism is arrested automatically on the breaking of either of the strands which are being doubled or twisted together, my invention consisting of certain features of construction whereby a stop motion device of the class described is rendered available for doubling or twisting together strands of different sizes, or for feeding one strand at a higher rate of speed than the other, or for effecting both of these results.

In the accompanying drawings-Figure 1 is a view, partly in elevation and partly in vertical longitudinal section, illustrating; a known form of stop motion device to which my invention has been added; Fig. 2 is an enlarged side elevation of those portions of the device to which my invention particularly relates; Fig. 3is a top view of the same; Fig. 1 is a vertical transverse section on the line a a, Fi 2, and Fig. 5 is a face view of the rollers whereby the strands are fed to the doubling or twisting mechanism.

Although I have, in the drawing, illustrated my invention as used in conjunction with a stoponotion device of a particular type, it should. be understood at the outset that the invention is not limited to such use, but may be adopted in connection with any of the ordinary stop-motion devices which act to arrest the movement of the doubling or twisting mechanism. in the event of the breaking of either of the strands which are being doubled or twisted together.

Preparatory to describing these parts of the mechanism which constitute the subject of my present invention, I will describe briefly the construction and operation of the stop-motion devices illustrated.

1. is aspindle carrying a flier 2 and having mounted upon it a spoolor bobbin on which the twisted strands are wound, said spindle having a fast pulley 4 and a loose pulley 5 for Specification of Letters Patent.

Application filed August 5, 1907.

Patented July 6, 1909.

Serial No. 387,225.

the reception of a driving belt 6 from a sheave 7 on the driving shaft 9.

The strands to be doubled and twisted are drawn from spools 10, suitably mounted, and each of said strands passes around a hoolr 11 on a lever 12, the two lovers being suitably mounted. upon a slide 13 whose forward. end engages and supports a lever 141;, connected by a rod 15 to a lever 16 and belt shifting jaws 17, the lever 16 being provided. with a friction pad 19.

The levers 12 are normally held out of en gagement with a rotating corrugated shaft 20 by the tension of the strands, but should either of these strands break its corresponding lever 12 falls into engagement with the corrugated shaft 20 and said lever is thereby pushed rearwardly, carrying with it the slide 13 and thus withdrawing the support from the lever 14, which thereupon drops and causes the belt shifter 17 to transfer the driving belt 6 from the fast pulley 4 to the loose pulley 5, and, at the same time, lowers the lever 16 so as to cause its friction pad 19 to come into contact with the upper surface of the pulley i and thereby arrest the further rotation of the same.

The elements of the machine which constitute the subject of my invention are as follows:

The lever 14 acts upon the lower end of a rod 21, free to slide in a suitable guide mounted upon a lived member of the framework of the machine, the upper end of said rod 21 being connected to the outer end of the long arm of a lever 23, fulcrumed upon a shaft or spindle 2 1:, which is carried by a bracket secured to another member of the fixed frame, the short arm of said lever 2-3 having hearings for the spindle of a feed roller 25 which: cooperates with another feed roller 26 carried by a shaft 27, the latter being mounted in suitable fixed hearings on the frame of the machine, and being rotated in the direction of the arrow shown in Fig. 1.

The greater portion of the weight of the long arm of the lever 23 and its depending rod 21 is borne by a coiled spring 29 interposed between the upper end of the guide tube 22 and a collar 30 on said rod 21, but, in order that the upward thrust of the feed roller 25 against the strand interposed hetween it and the rotating feed rellerj26 may be accurately regulated, I provide a yoke 31, carried by the long arm of the lever 23, with a sliding weight 32, which can be adjusted nearer to or farther from the fulcrum of said lever 23 in order to vary the effective upward thrust of the short arm of the lever which carries the feed roller 25.

The mechanism described provides for the feeding of one of the pair of strands, and, for the feeding of the other strands, I provide a separate lever 33, whose long arm carries a weight 34, said lever being fulcrumed upon the same shaft or spindle 24f which carries the lever 23, the short arm of said lever 33 being provided with bearings for a feed roll 35 which cooperates with a rotating feed roll 36 on the shaft 27.

Secured to the long arm of the lever 23 is a bracket 39 whose projecting member carries a set screw 40 located beneath the long arm of the lever 33.

Supposing that the rolls 25 and. 26 are feeding a small strand, and that the rolls 35 and 36 are feeding a larger strand, the long arm of the lever 33 will be lifted clear of the set screw 40, the pressure of the roll 35 against its strand being determined by the weight 34, and that of the roll 25 against its strand by the weight 32. Should either strand break, however, the long arm of the lever 23 will be lifted, and its set screw 410 will strike the lever 33, whereby both of the feed rolls 25 and 35 will be lowered, and the further feed of both strands will be arrested.

As the two strands are treated independently it is obvious that one of the strands can be larger than the other without interfering with the feed of the smaller strand, and the strands may also be fed at different rates of speed, if desired. In the present instance I have shown the feed roll 26 as being slightly greater in diameter than the feed roll 36, hence the strand fed by the rolls 25 and 26 will be delivered at a slightly higher rate of speed than the strand which is controlled by the rolls 35 and 36, as may he demanded by the exigencies of the twist which is being imparted to the double strand as for instance when the smaller strand is being twisted around a larger strand acting in the nature of a core.

Although I have shown my invention as applied to a doubling machine dealing with but two strands it can, as will be evident, be applied to machines for twisting together more than two strands, such change involv ing simply a corresponding increase in the number of straml-feeding devices and lovers.

The twisting of the strands begins as soon as they leave the feed rollers and continues from that point to the top of the flier.

I claimz- 1. The combination, in a doubling or twisting machine, of a single doubling or twisting device with separate and independent feeding devices, one for each strand, and a stop-motion device operable 011 the breaking of either strand but controlling all of said feeding devices.

2. The combination, in a doubling or twisting machine, of a single doubling or twisting device with a plurality of strandfeeding devices, a stop-motion device acting to render inoperative one of the said feeding devices, and connections whereby the device so operated is caused to render inoperative the other feeding device or devices of the set.

3. The combination, in a doubling or twisting machine, of a single doubling or twisting device, a single feed roll having portions of different diameters, one for each of a plurality of strands, and independent friction rolls, one for each portion of the feed roll whereby each strand is held in contact with its respective portion of said feed roll.

4. The combination, in a doubling or twisting machine, of a single doubling or twisting device with a plurality of strandfeeding devices, means for imparting a higher surface speed to one set of feeding devices than to another, and a stop-motion device whereby said feeding devices are rendered inoperative.

5. The combination, in a doubling or twisting machine, of a single doubling or twisting device, with a plurality of independent strand-feeding devices, one for each strand and a stop motion device operable on the breaking of either strand and serving in that event to arrest the operation of the doubling or twisting device and of the plurality of strand feeding devices.

6. The combination, in a doubling or twisting machine, of a plurality of strand.- feeding devices, each comprising a drive roll and a friction roll, a carrying lever for each of said friction rolls, a stop-motion device acting upon one of said carrying levers, and a connection between the said lever and the other lever or levers of the set.

7. The combination, in a doubling or twisting machine, of a strand-feeding device comprising a drive roll and a friction roll, a lever carryin said friction roll on one arm and. having a spring support for the other arm, and a stop-motion device acting through said lever to separate the strand-feeding rolls.

8. The combination, in a doubling or twisting machine, of strand feeding devices comprising a drive roll and a friction roll, a lever having one arm carrying said friction roll and a spring support for the other arm, an adjustable weight on said lever, and a stop-motion device acting through the medium of the lever to separate the feed rolls.

9. The combination, in a doubling or twisting machine, of strand-feeding devices comprising a drive roll and a friction roll, a

said friction rolls, a stop-motion device actlever having one arm carrying said friction ing upon one of said levers, and a bracket roll and another arm having a s ring support and a side yoke with adjusta le Weight thereon, and a stop-motion device acting on said lever to effect separation of the feed rolls.

carried by said lever and having a set screw 15 acting upon the other lever.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

FREDRlCK WILLIAM ROCHELLE.

Witnesses:

WM. M. BRINKWORTI-I, ANNA Horsnrznn. 

